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Hello, I am relatively new to the Arduino community and do not have as much experience as most of the other users.  I have an Arduino Uno, and plan on getting the Centipede Shield (http://macetech.com/store/index.php?main_page=product_info&products_id=23) in order to expand the I/O number.  I understand that the shield adds an additional 64 pins, but is that in addition to the already 14 digital pins (making 78 usable digital pins) since the shield uses the analog pins to communicate, or are the only usable digital pins the 64 on the shield? I cannot seem to find this information online.

Thanks for your help!
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Reads to me like the existing digital pins are intact, since it adds 64 pins by sacrificing 2 of the analog pins.

Edit... Looking at their sample sketch, you preface each command with CS. as in CS.digitalWrite(5, HIGH); which refers to the new pin 5. So pretty sure original pin 5 will still be available as digitalWrite(5, HIGH);
« Last Edit: December 28, 2013, 12:58:55 am by JimboZA » Logged

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Reads to me like the existing digital pins are intact, since it adds 64 pins by sacrificing 2 of the analog pins.

Edit... Looking at their sample sketch, you preface each command with CS. as in CS.digitalWrite(5, HIGH); which refers to the new pin 5. So pretty sure original pin 5 will still be available as digitalWrite(5, HIGH);

JimboZA, thank you very much.  I am going to try and use this and hope it works! I'll update the status incase someone wants to reference this in the future.
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JimboZA is correct, the other pins all pass through the shield. The only four pins connected to the Arduino are A4, A5, 5V, and GND.
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You also can use the A0..A3 as digital pin so in fact you have 14 +4 + 64 = 82 digital pins.
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